Replaceable shoe for auger

ABSTRACT

Shoes for worn or new paving augers that can be installed over and in conformity with the paving auger to provide additional life for the auger. A first wall of the auger shoe is formed with a bore, an enlarged diameter bore and a countersunk hole so as to accommodate either a cap screw with a hexagonal head, a plow bolt with a square shoulder, a bolt with a flat head, a bolt with a hexagonal head, a hexagonal nut, a flat head screw or a flat head socket type screw, and still provide a flush seat for the fastener in the front wall of the auger shoe to thereby maintain an unobstructed surface on the front wall of the auger shoe. In addition, the auger shoes can be installed against both the front and back walls of the auger.

United States Patent [1 1 Lutz 1 1 Oct. 2, 1973 1 1 REPLACEABLE SHOE FOR AUGER Primary ExaminerRichard E. Aegerter [76] Inventor: Kenneth V. Lutz, Saratoga, Calif. Anomeyjack wlselman [22] Filed: Sept. 24, 1971 v [52] US. Cl. 198/213 [51] Int. Cl. B65g 33/00 [58] Field of Search 198/213; 188/250 G I56] References Cited UNITED STATES PATENTS 3,197,895 8/1965 Cooke 37/141 R 3,456,370 7/1969 Gilbertson 37/141 R 3,194,385 7/1965 Barnese 198/213 1,716,392 6/1929 Thompson 188/250 G 1,891,723 12/1932 Novak...,.l...; ..L 188/250 G 3,485,341 12/1969 Lutz 198/213 2,480,419 8/1949 Patterson 198/213 Appl. No.: 183,329

[57] ABSTRACT Shoes for worn or new paving augers that can be installed over and in conformity with the paving auger to provide additional life for the auger. A first wall of the auger shoe is formed with a bore, an enlarged diameter bore and a countersunk hole so as to accommodate either a cap screw with a hexagonal head, a plow bolt with a square shoulder, a bolt with a flat head, a bolt with a hexagonal head, a hexagonal nut, a flat head screw or aflat head socket type screw, and still provide a flush seat for the fastener in the front wall of the auger shoe to thereby maintain an unobstructed surface on the front wall ofthe auger shoe. In addition, the auger shoes can be installed against both the front and back walls of the auger.

11 Claims, 10 Drawing Figures Pmminw'zms 3.762.537

SHEET 1 BF 2 FIG 5 INVENTOR KENNETH l 1072 ydufw ATTORNEY REPLACEABLE SHOE FOR AUGER BACKGROUND OF THE INVENTION The present invention relates in general to paving augers, and more particularly to replacement shoes for paving augers to extend the life and the efficiency of the paving auger.

Auger shoes have been disclosed in patent to Kenneth V. Lutz, US. Pat. No. 3,445,341, issued on Dec. 23, 1969. In such shoes, however, certain types of bolt heads and nuts'projected outwardly from the front wall. In-so doing, the projecting surface tended to impede the rotation of the auger which caused additional consumption of power. Also, the projecting surface provided an area for the accumulation of asphalt which resulted in additional wear on the shoe and fastening devices.

An application of interest is my copending application, Ser. No. 879,042, filed on Nov. 24, 1969, for Asphalt Mixer Tip.

SUMMARY OF THE INVENTION A replacement shoe for an auger in which a bore, an enlarged diameter bore and a countersunk opening is formed in the front wall of the auger shoe to accommodate various types of fastening devices, and, also, to optionally install replacement shoes on both sides of the auger. i

By virtue of this arrangement, the fastening devices are seated in the front wall of the auger shoe flush with or below the exposed surface thereof. Thus, the fastening I devices form an unobstructing surface with the front wall of the auger shoe. This affords a smooth, less impeded movement of the auger shoethrough asphalt. Also, the accumulation of asphalt in crevices adjoining the fastening devices is reduced, for improved wear of the fastener and the auger shoe.-

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is'a perspective view of 'a representative paving machine with a paving auger shown in a cut-a-way portion thereof FIG. 2 is a fragmentary, elevation view of the paving auger of FIG.'1 with shoes embodying the present invention attached thereto. 4 I FIG. 3 is a fragmentary, elevation of the paving auger of FIG. 1 with shoes embodying the present invention attached on both sides of the paving auger.

FIG. 4 is a rear perspective view of the replacement shoe for an auger embodying the present invention.

FIG. 5 is a front perspective view of the replacement shoe shown in FIG. 4. 4 I f I v FIG. 6is a fragmentary, section view taken along line 6-6- of FIG. 2for illustrating the attachment of the replacement shoe of FIG. 4 to the auger by means of a hexagonalhead cap screw.

FIG. 7 is a fragmentary, section view 6 for illustrating the attachmentof the replacement shoe of FIG. 4 to the auger by means of a hexagonal jam nut. 1

FIG. 8 is a fragmentary section view similar to FIG. 6 for illustrating the-attachment of the replacement shoe of FIG. 4 to the auger, by means of a square shoulder, round head, plow bolt.

-FlG.'9'is a fragmentary section view similar to FIG. 6 for illustratingthe attachment of the replacement shoe of FIG. 4 to the auger by means ofa square shoulsimilar to FIG.

der, flat head, plow bolt with a hexagonal nut.

FIG. 10 is a fragmentary section view taken along line l010 of FIG. 3.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Illustrated in FIG. 1 is a self-powered paving machine which is fed by a truck 21. Paving material, such as asphalt, is impelled by a paving auger 22 for discharge through'an outlet spreader 23. The paving auger 22 is rotated by a drive means, not shown. As the auger is rotated within asphalt, an auger shaft 24 and auger plates 25 are subjected to considerable wear and tear. As the plates 25 wear away, the auger 22 becomes less efficient. Hence, the auger plate 25, when worn, requires a replacement shoe for the restoration thereof.

Illustrated in FIGS. 2, 4 and 5 is an auger shoe which comprises a rear wall 31, a front wall 32, a curved top wall 33, a curved bottom wall 34, an angularly directed side wall and an angularly directed side wall 36. The length of the curved top wall 33 is greater than the length of the curved bottom wall 34 so that the side walls 35 and 36 are directed inwardly from top to bottom. Along the curved top wall 33 is a flange 37 that fits over the auger plate 25 of the paving auger 22. The auger shoe 30 is usually a one piece casting.

Generally, two openings are formed in the auger plate 25 aligned with two openings in the auger shoe for receivingfastening screws therethrough to'attach the auger shoe to the worn auger plate. According to the present invention, the openings in the front wall of the auger shoe 30 are formed'so that various types of bolt heads, or a nut, will fit flush with or below the surface thereof. Optionally, the openings of the auger plate 25 are formed so that various types of bolt heads or a nut willfit flush with or below the exposed surface thereof. More specifically, the front wall or-the wall receiving a fastening device'of the auger shoe 30 has formed therein a bore 38, an enlarged bore 39 and a countersunk opening 40. The bore 38, the enlarged diameter bore 39 and the countersunk openings 40 extend through the shoe'to emerge at the back wall 31-.

Optionally, the auger'plate 25 can be formed with a countersunk opening 41 (FIG. 9) and an enlarged diameter bore adjacent a bore 42 (FIGS. 6, 7 and 8) so that'various types of bolt heads or a nut will fit flush with or below the surface thereof, receiving the fastenrespectively, of the augerplate 25. Hexagonal nuts 46 are threaded, respectively, on the cap screws 45. Through this arrangement, the hexagonal heads of the cap screws are flush with the front wall-32 of the auger shoe 30 or are below the surface of the front wall In FIG. 9, it is shown that the auger shoe 30 is attached to the auger plate 25 by means of square shoulder, flat head, plow bolts 47 (only one beingshown in FIG. 9) that are received, respectively, by thebores, enlarged diameter bores and the countersunk'openings 41 of the auger plate 25, and also received, respectively, by the bores 38, enlarged diameter bores 39 and the countersunk openings 40 of the auger'shoe 30.

Also, hexagonal nuts 48 are received by the enlarged diameter bores 39 and the countersunk openings 40, respectively, of the auger shoe 30 which are threaded on the flat head plow bolts 47. The nuts 48 are thus flush with the front wall 32 or are below the surface of the front wall 32. The nuts 48 could be received by the enlarged diameter bore and countersunk opening 41 of the auger plates 25 and the head of the bolt 47 received by the bore 38, the enlarged diameter bore 39 and the countersunk opening 40 of the replacement shoe 30.

In FIG. 8, it is shown that the auger shoe 30 is attached to the auger plate 25 by means of square shoulder, round head plow bolts 50 (only one being shown in FIG. 8) that are received by the bores 38, enlarged diameter bores 39 and the countersunk openings 40, respectively, of the auger shoe 30 and the bores 42, respectively of the auger plate 25. Hexagonal nuts 51 are threaded on the plow bolts 50, respectively. Through this arrangement, the heads of the plow bolts 50 are flush with the front wall 32 of the auger shoe 30 or are below the surface of the front wall 32.

In FIG. 7 it is shown that the auger shoe 30 is attached to the auger plate 25 by means of hexagonal head jam nuts 52 (only one being shown in FIG. 7) that are received by the bores 42, respectively, of the auger plate 25 and also received by the bores 38, enlarged diameter bores 39 and the countersunk openings 40, respectively, of the auger shoe 30. Also, hexagonal nuts 53 are received by the enlarged diameter bores 39 and the countersunk openings 40, respectively, of the auger shoe 30 which are threaded on the jam nuts 52, respectively. The nuts 53 are, therefore, flush with the front wall 32 or are below the surface of the front wall 32.

In FIG. 10, there is an auger shoe attached to each side of the auger plate 25. On one side of the auger plate 25 is the auger shoe 30. On the opposite side of the auger plate 25 is an auger shoe 30!. The auger shoe 30' is similar to the auger shoe 30 with the exception that a flange 37' is directed in a direction opposite from the flange 37 of the auger shoe 30. The auger shoe 30 includes a front wall 32, a back wall 31 a curved top wall 33', a curved bottom wall 34', an angularly directed side wall 35 and an angularly directed side wall 36'. The length of the curved top wall 33 is greater than the length of the curved bottom wall 34' so that the side walls 35 and 36' are directed inwardly from top to bottom. The flange 37 fits over the auger plate 25 and confronts the flange 37 of .the auger shoe 30. The auger shoe 30 is usually a onevpiece casting.

Countersunk openings 40 bores 38 and enlarged diameter. bores 39 are formed in the auger shoe 30 aligned with the respective countersunk openings 40 of the auger shoe 30 and also aligned with respective bores 42 formed in the auger plate 25.. By having the enlarged diamter bores 39' and the countersunk openings 40' formed in the auger plate 30, any fastening de vice receive d therein would be flush with the surface of the front wall 32 or be dispoed below the surface of the front wall 32'.

In attaching the auger shoes 30 and 30' to the auger plate 25, screws or bolts 60 received by the countersunk openings 40, respectively, of the auger shoe 30 advance through the bores 42, respectively, of the auger plate 25 and extend into the countersunk openings 40' respectively, of the auger shoe 60. Nuts 61 are threaded in the screws or bolts 60, respectively, of the auger shoe 30'. From this arrangement, the heads of the screws or bolts are flush with or below the surface of the front wall 32 of the auger shoe 30 and the nuts 61 are flush with or below the surface of the front wall 32' of the auger shoe 30'.

By virtue of this arrangement, the drag on the paving auger 22 is reduced and, hence, power consumption by the paving machine 10 is also reduced.

I claim:

1. In combination:

a. an auger plate formed with a fastening device receiving opening therethrough;

b. a replacement shoe for engaging saidauger plate, said replacement shoe being formed with a bore, said replacement shoe being formed with a front wall having an enlarged diameter bore walls substantially parallel to the axis of said bore and a countersunk opening having tapered walls aligned and communicating with the bore for forming a fastening device receiving opening through said replacement shoe; and a fastening device received by said fastening device receiving openings in said auger plate and said replacement shoe for securing said replacement shoe on said auger plate.

2. The combination as claimed in claim 1 wherein said fastening device is a bolt and nut with the head of said bolt seated in said enlarged diameter bore and said countersunk opening formed in the front wall of said replacement shoe.

3. The combination as claimed in claim 1 wherein said fastening device is a screw and nut with the head of said screw seated in the enlarged diameter bore and the countersunk opening formed in the front wall of said replacement shoe.

4. The combination as claimed in claim 1 wherein said fastening device is a bolt and nut with said nut seated in the enlarged diameter bore and the countersunk opening formed in the front wall of said replacement shoe.

5. The combination as claimed in claim 1 wherein said auger plate is formed with a front wall having a bore, an enlarged diameter bore and a countersunk opening forming the fastening device receiving opening through said auger plate.

6. The combination as claimed in claim 5 wherein said fastening device is a bolt and nut with the head of said bolt seated in said enlarged'diameter bore and said countersunk opening formed in the front wall of said auger plate and with said nut seated in said enlarged diameter bore and said countersunk opening formed in the front wall of said replacement shoe.

7. In combination:

a. an auger plate formed with a fastening device receiving opening therethrough;

b. a'first replacement shoe for engaging one wall of said auger plate, said first replacement shoe being formed with a bore, said first replacement shoe being formed with a front wall having an enlarged diameter bore walls substantially parallel to the axis of said bore and a countersunk opening having tapered walls aligned and communicating with the bore in said first replacement shoe, a fastening device receiving opening therethrough; and

a second replacement shoe for engaging another wall of said auger plate, said second replacement shoe being formed with a bore, said second replacement shoe being formed with a front wall having an enlarged diameter bore walls substantially parallel to the axis of said bore and a countersunk opening having tapered walls aligned and communicating with the bore in said second replacement shoe to form a fastening device receiving opening therethrough', and

d. a fastening device received by said fastening device receiving opening in said auger plate, said first replacement shoe and said second replacement shoe for securing said first and second replacement shoes on said auger plate.

8. The combination as claimed in claim 7 wherein said fastening device is a bolt and nut with the head of said bolt seated in the enlarged diameter bore and the countersunk opening formed in the front wall of said first replacement shoe and with said nut seated in the enlarged diameter bore and the countersunk opening formed in the front wall of said second replacement shoe.

9. A replacement shoe for an auger plate comprising:

a. a front wall;

b. a back wall; and

c. an arcuate outer wall with a flange projecting from said front wall and overlying said back wall;

d. said replacement shoe being formed with a bore,

said front wall being formed with an enlarged diameter bore walls substantially parallel to the axis of said bore and a countersunk opening having tapered walls aligned and communicating with said bore to form a fastening device receiving opening extending through said front and back walls.

l0. A replacement shoe as claimed in claim 9 and comprising an arcuate inner wall of a smaller peripheral surface than said arcuate outer wall.

11. A replacement shoe as claimed in claim 10 and comprising angular disposed side walls interconnecting said inner and outer arcuate walls. 

1. In combination: a. an auger plate formed with a fastening device receiving opening therethrough; b. a replacement shoe for engaging said auger plate, said replacement shoe Being formed with a bore, said replacement shoe being formed with a front wall having an enlarged diameter bore walls substantially parallel to the axis of said bore and a countersunk opening having tapered walls aligned and communicating with the bore for forming a fastening device receiving opening through said replacement shoe; and c. a fastening device received by said fastening device receiving openings in said auger plate and said replacement shoe for securing said replacement shoe on said auger plate.
 2. The combination as claimed in claim 1 wherein said fastening device is a bolt and nut with the head of said bolt seated in said enlarged diameter bore and said countersunk opening formed in the front wall of said replacement shoe.
 3. The combination as claimed in claim 1 wherein said fastening device is a screw and nut with the head of said screw seated in the enlarged diameter bore and the countersunk opening formed in the front wall of said replacement shoe.
 4. The combination as claimed in claim 1 wherein said fastening device is a bolt and nut with said nut seated in the enlarged diameter bore and the countersunk opening formed in the front wall of said replacement shoe.
 5. The combination as claimed in claim 1 wherein said auger plate is formed with a front wall having a bore, an enlarged diameter bore and a countersunk opening forming the fastening device receiving opening through said auger plate.
 6. The combination as claimed in claim 5 wherein said fastening device is a bolt and nut with the head of said bolt seated in said enlarged diameter bore and said countersunk opening formed in the front wall of said auger plate and with said nut seated in said enlarged diameter bore and said countersunk opening formed in the front wall of said replacement shoe.
 7. In combination: a. an auger plate formed with a fastening device receiving opening therethrough; b. a first replacement shoe for engaging one wall of said auger plate, said first replacement shoe being formed with a bore, said first replacement shoe being formed with a front wall having an enlarged diameter bore walls substantially parallel to the axis of said bore and a countersunk opening having tapered walls aligned and communicating with the bore in said first replacement shoe, a fastening device receiving opening therethrough; and c. a second replacement shoe for engaging another wall of said auger plate, said second replacement shoe being formed with a bore, said second replacement shoe being formed with a front wall having an enlarged diameter bore walls substantially parallel to the axis of said bore and a countersunk opening having tapered walls aligned and communicating with the bore in said second replacement shoe to form a fastening device receiving opening therethrough; and d. a fastening device received by said fastening device receiving opening in said auger plate, said first replacement shoe and said second replacement shoe for securing said first and second replacement shoes on said auger plate.
 8. The combination as claimed in claim 7 wherein said fastening device is a bolt and nut with the head of said bolt seated in the enlarged diameter bore and the countersunk opening formed in the front wall of said first replacement shoe and with said nut seated in the enlarged diameter bore and the countersunk opening formed in the front wall of said second replacement shoe.
 9. A replacement shoe for an auger plate comprising: a. a front wall; b. a back wall; and c. an arcuate outer wall with a flange projecting from said front wall and overlying said back wall; d. said replacement shoe being formed with a bore, said front wall being formed with an enlarged diameter bore walls substantially parallel to the axis of said bore and a countersunk opening having tapered walls aligned and communicating with said bore to form a fastening device receiving opening extending through said front and back walls.
 10. A replacement shoe as claimed in claIm 9 and comprising an arcuate inner wall of a smaller peripheral surface than said arcuate outer wall.
 11. A replacement shoe as claimed in claim 10 and comprising angular disposed side walls interconnecting said inner and outer arcuate walls. 